Atmospheric iron fluxes over the last deglaciation: Climatic implications
International audience A decrease in the micronutrient iron supply to the Southern Ocean is widely believed to be involved in the atmospheric CO2 increase during the last deglaciation. Here we report the first record of atmospheric iron fluxes as determined in 166 samples of the Dome C ice core and...
Published in: | Geophysical Research Letters |
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Format: | Article in Journal/Newspaper |
Language: | English |
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Online Access: | https://insu.hal.science/insu-00375478 https://insu.hal.science/insu-00375478/document https://insu.hal.science/insu-00375478/file/2005GL024352.pdf https://doi.org/10.1029/2005GL024352 |
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ftunigrenoble:oai:HAL:insu-00375478v1 2024-05-12T08:05:12+00:00 Atmospheric iron fluxes over the last deglaciation: Climatic implications Gaspari, Vania Barbante, Carlo Cozzi, Giulio Cescon, Paolo F. Boutron, Claude Gabrielli, Paolo Capodaglio, Gabriele Ferrari, Christophe, P. Robert Petit, Jean Delmonte, Barbara Environmental Sciences Department University of Ca’ Foscari Venice, Italy Institute for the Dynamics of Environmental Processes-CNR Laboratoire de glaciologie et géophysique de l'environnement (LGGE) Observatoire des Sciences de l'Univers de Grenoble (OSUG) Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS) Unité de Formation et de Recherche de Physique Université Joseph Fourier - Grenoble 1 (UJF) Polytech Grenoble Dipartimento di Scienze dell'Ambiente e del Territorio (DISAT) Università degli Studi di Milano = University of Milan (UNIMI) European Project for Ice Coring in Antarctica (EPICA) 2006 https://insu.hal.science/insu-00375478 https://insu.hal.science/insu-00375478/document https://insu.hal.science/insu-00375478/file/2005GL024352.pdf https://doi.org/10.1029/2005GL024352 en eng HAL CCSD American Geophysical Union info:eu-repo/semantics/altIdentifier/doi/10.1029/2005GL024352 insu-00375478 https://insu.hal.science/insu-00375478 https://insu.hal.science/insu-00375478/document https://insu.hal.science/insu-00375478/file/2005GL024352.pdf doi:10.1029/2005GL024352 info:eu-repo/semantics/OpenAccess ISSN: 0094-8276 EISSN: 1944-8007 Geophysical Research Letters https://insu.hal.science/insu-00375478 Geophysical Research Letters, 2006, 336 (L03704), 1 à 4 p. ⟨10.1029/2005GL024352⟩ Greenhouse gases Ice cores [SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology info:eu-repo/semantics/article Journal articles 2006 ftunigrenoble https://doi.org/10.1029/2005GL024352 2024-04-18T03:21:07Z International audience A decrease in the micronutrient iron supply to the Southern Ocean is widely believed to be involved in the atmospheric CO2 increase during the last deglaciation. Here we report the first record of atmospheric iron fluxes as determined in 166 samples of the Dome C ice core and covering the last glacial-interglacial transition (22–9 kyr B.P.). It reveals a decrease in fallout flux from 24 × 10−2 mg Fe m−2 yr−1 during the Last Glacial Maximum to 0.7 × 10−2 mg Fe m−2 yr−1 at the onset of the Holocene. The acid leachable fraction of iron determined in our samples was the 60% of the total iron mass in glacial samples, about twice the value found for Holocene samples. This emerging difference in iron solubility over different climatic stages provides a new insight for evaluating the iron hypothesis over glacial/interglacial periods. Article in Journal/Newspaper ice core Southern Ocean Université Grenoble Alpes: HAL Southern Ocean Geophysical Research Letters 33 3 |
institution |
Open Polar |
collection |
Université Grenoble Alpes: HAL |
op_collection_id |
ftunigrenoble |
language |
English |
topic |
Greenhouse gases Ice cores [SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology |
spellingShingle |
Greenhouse gases Ice cores [SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology Gaspari, Vania Barbante, Carlo Cozzi, Giulio Cescon, Paolo F. Boutron, Claude Gabrielli, Paolo Capodaglio, Gabriele Ferrari, Christophe, P. Robert Petit, Jean Delmonte, Barbara Atmospheric iron fluxes over the last deglaciation: Climatic implications |
topic_facet |
Greenhouse gases Ice cores [SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology |
description |
International audience A decrease in the micronutrient iron supply to the Southern Ocean is widely believed to be involved in the atmospheric CO2 increase during the last deglaciation. Here we report the first record of atmospheric iron fluxes as determined in 166 samples of the Dome C ice core and covering the last glacial-interglacial transition (22–9 kyr B.P.). It reveals a decrease in fallout flux from 24 × 10−2 mg Fe m−2 yr−1 during the Last Glacial Maximum to 0.7 × 10−2 mg Fe m−2 yr−1 at the onset of the Holocene. The acid leachable fraction of iron determined in our samples was the 60% of the total iron mass in glacial samples, about twice the value found for Holocene samples. This emerging difference in iron solubility over different climatic stages provides a new insight for evaluating the iron hypothesis over glacial/interglacial periods. |
author2 |
Environmental Sciences Department University of Ca’ Foscari Venice, Italy Institute for the Dynamics of Environmental Processes-CNR Laboratoire de glaciologie et géophysique de l'environnement (LGGE) Observatoire des Sciences de l'Univers de Grenoble (OSUG) Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS) Unité de Formation et de Recherche de Physique Université Joseph Fourier - Grenoble 1 (UJF) Polytech Grenoble Dipartimento di Scienze dell'Ambiente e del Territorio (DISAT) Università degli Studi di Milano = University of Milan (UNIMI) European Project for Ice Coring in Antarctica (EPICA) |
format |
Article in Journal/Newspaper |
author |
Gaspari, Vania Barbante, Carlo Cozzi, Giulio Cescon, Paolo F. Boutron, Claude Gabrielli, Paolo Capodaglio, Gabriele Ferrari, Christophe, P. Robert Petit, Jean Delmonte, Barbara |
author_facet |
Gaspari, Vania Barbante, Carlo Cozzi, Giulio Cescon, Paolo F. Boutron, Claude Gabrielli, Paolo Capodaglio, Gabriele Ferrari, Christophe, P. Robert Petit, Jean Delmonte, Barbara |
author_sort |
Gaspari, Vania |
title |
Atmospheric iron fluxes over the last deglaciation: Climatic implications |
title_short |
Atmospheric iron fluxes over the last deglaciation: Climatic implications |
title_full |
Atmospheric iron fluxes over the last deglaciation: Climatic implications |
title_fullStr |
Atmospheric iron fluxes over the last deglaciation: Climatic implications |
title_full_unstemmed |
Atmospheric iron fluxes over the last deglaciation: Climatic implications |
title_sort |
atmospheric iron fluxes over the last deglaciation: climatic implications |
publisher |
HAL CCSD |
publishDate |
2006 |
url |
https://insu.hal.science/insu-00375478 https://insu.hal.science/insu-00375478/document https://insu.hal.science/insu-00375478/file/2005GL024352.pdf https://doi.org/10.1029/2005GL024352 |
geographic |
Southern Ocean |
geographic_facet |
Southern Ocean |
genre |
ice core Southern Ocean |
genre_facet |
ice core Southern Ocean |
op_source |
ISSN: 0094-8276 EISSN: 1944-8007 Geophysical Research Letters https://insu.hal.science/insu-00375478 Geophysical Research Letters, 2006, 336 (L03704), 1 à 4 p. ⟨10.1029/2005GL024352⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1029/2005GL024352 insu-00375478 https://insu.hal.science/insu-00375478 https://insu.hal.science/insu-00375478/document https://insu.hal.science/insu-00375478/file/2005GL024352.pdf doi:10.1029/2005GL024352 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1029/2005GL024352 |
container_title |
Geophysical Research Letters |
container_volume |
33 |
container_issue |
3 |
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1798847470400176128 |